In a statement, the Organization for the Prohibition of Chemical weapons (OPCW) said the declaration was submitted three days ahead of schedule.

OPCW inspectors are also due to complete visiting the last four of 23 weapons sites declared by Syria.

The OPCW's mission was set up following reports of a chemical attack near the Syrian capital in August.

Sixty inspectors have been in Syria since 1 October. The OPCW, which is based in The Hague, said on Friday that its team in Syria had visited 19 of the 23 sites disclosed by Syria.

Under the UN resolution which set up the mission, Syria's chemical weapons production equipment must be destroyed by 1 November and stockpiles must be disposed of by mid-2014.

The organization’s work in Syria marks the first time the international chemical weapons watchdog - which won this year's Nobel Peace Prize - has been asked to oversee the destruction of a weapons armory during a conflict.

More than 100,000 people have been killed in the fighting that has ravaged Syria for two-and-a-half years, according to the UN.

More than two million people have fled Syria and some 4.5 million have been forced from their homes within the country.

SHI/SHI